LS ELECTRIC L7NHF Series, User Manual

Page: 226 / 409

10. Object Dictionary
10-34
0x2011 PWM Off Delay Time ALL
Variable
Type
Setting Range Initial Value Unit
Accessi
bility
PDO
Assignm
ent
Variable
Attribute
Savin
g
UINT 0 to 1000 10 ms RW No Always Yes
You can set the delay time until PWM is actually turned off after the servo off command. When
you use a motor with a brake installed on the vertical axis, you can make the brake signal
output to come out first then PWM be turned off after the set time, in order to prevent the axis
from flowing down vertically.
Time
Motor Brake
PWM output
Shaft flow-down
Thump
Time
Motor Brake
PWM output
The shaft
gets fixed
Maintained
SV-OFF command
70[ms]
SV-OFF command
200[ms]
For 0x2011: 70 [msec]
For 0x2011: 200 [msec]
150[ms]
150[ms]
A1
A2
For example, assume that you have set the brake to operate 150 [msec] after a servo off
command during operation of a motor with a brake installed on its vertical axis. If you set the
parameter to 50 [msec], PWM is turned off in 50 [msec] after a servo off command, causing A1
to occur in which the brake cannot be held. In this case, the axis flows down because of gravity.
However, if you set the parameter to 200 [msec], an overlapped section (green) appears in
which PWM is output for 50 [msec] and the brake can be held, which can maintain the vertical
axis.